-
12
-
1.1. A bridge rectifier converts AC to DC;
1.2. After secondary rectification and reactor filtering, output welding current is
delivered that meets the welding requirements;
1.3. Controlled by PWM the IGBT inverts the DC to 20KHz AC which is transmitted
via a high-frequency transformer;
1.4. The in-time protection circuit provides signals to the PWM warning for overheat
and over-current situations;
1.5. A closed-loop control system ensures a good anti-grid fluctuation ability and an
excellent cutting performance.
Installation and Wiring
1. Location Requirements
1.1.
The machine should not be installed in an area where it is exposed to direct
sunlight or rain but where the humidity is as low as possible and the ambient
temperature is within the range of
-
10°C
-
40°C.
1.2.
The machine should be installed on a flat, preferable level surface but, in any
case not on a surface with an inclination of more than 10°.
1.3.
The machine should not be operated in a work station exposed to wind. Should
a windy environment be unavoidable, suitable screening should be installed.
1.4.
In order to allow for efficient ventilation, a clear space of at least 20cm should be
allowed in front of and behind the machine as well as at least 10cm at each side.
2. Power Input Requirements
The power supply waveform should be the standard sin wave, the rated voltage
380V±10% 50/60Hz. Three phase voltage unbalance should be
≤
5
%.
Model
MMA-400
MMA-400L PRO
Parameters
Value
Rated input current
：
33.7A
56A
Input cable
：
≥4mm
2
≥6mm
2
Output cable
：
50mm
2
50mm
2
Ground cable
：
≥4mm
2
≥6mm
2
